<template>
  <form action="/">
    <van-search
        v-model="searchText"
        show-action
        placeholder="请输入搜索关键词"
        @search="onSearch"
        @cancel="onCancel"
    />
  </form>
  <van-divider content-position="left">已选标签</van-divider>
  <div v-if="activeIds.length === 0">请选择标签</div>
  <van-row gutter="16">
    <van-col v-for="tag in activeIds">
      <van-tag closeable size="small" type="primary" @close="doClose(tag)">
        {{ tag }}
      </van-tag>
    </van-col>
  </van-row>

  <van-divider content-position="left">选择标签</van-divider>
    <van-tree-select
        v-model:active-id="activeIds"
        v-model:main-active-index="activeIndex"
        :items="tagList"
    />
  <div style="padding: 12px">
  <van-button block type="primary" @click="doSearchResult">搜索</van-button>
  </div>
</template>

<script setup>
import { ref } from 'vue';
import { Toast } from 'vant';
import {useRouter} from "vue-router";

const router = useRouter()

const searchText = ref('');

const originTagList = [{
  text: '性别',
  children: [
    {text: '男', id: '男'},
    {text: '女', id: '女'},
  ],
},
  {
    text: '年级',
    children: [
      {text: '大一', id: '大一'},
      {text: '大二', id: '大二'},
      {text: '大三', id: '大三'},
      {text: '大四', id: '大四'},
    ],
  },
  {
    text: '技术栈',
    children: [
      {text: 'C/C++', id: 'C/C++'},
      {text: 'Java', id: 'Java'},
      {text: 'Python', id: 'Python'},
      {text: 'C#', id: 'C#'},
      {text: '.NET', id: ',NET'},
      {text: 'JavaScript', id: 'JavaScript'},
      {text: 'Golang', id: 'Golang'},
      {text: 'PHP', id: 'PHP'},
      {text: '前端', id: '前端'},
    ],
  },
]

// 标签列表
let tagList = ref(originTagList);

/**
 * 搜索过滤
 * @param val
 */
const onSearch = (val) => {
  tagList.value = originTagList.map(parentTag => {
    const tempChildren = [...parentTag.children];
    const tempParentTag = {...parentTag};
    tempParentTag.children = tempChildren.filter(item => item.text.includes(searchText.value));
    return tempParentTag;
  });
}
    const onCancel = () => {
      searchText.value = '';
      tagList.value = originTagList;
    };
    //已选中的标签
    const activeIds = ref([]);
    const activeIndex = ref(0);

//移除标签
const doClose = (tag) => {
    activeIds.value = activeIds.value.filter(item => {
        return item !== tag;
    } )
}

//执行搜索
const doSearchResult = () =>{
  router.push({
    path:'/user/list',
    query:{
      tags: activeIds.value
    }
  })

}
</script>

<style scoped>

</style>